Hose clamp



D. B. KATES HOSE CLAMP Sept. 8, 1953 Filed Oct. 1 1951 R m m m Patented Sept. 8, 1953 UNITED STATES ATENT OFFICE 2,651,095 nose CLAMP Don B. Kates, Los Angeles, Calif. Application October 1, 1951, Serial No. 249,939

This invention relates to hose clamps, and more particularly the type approved for use in aircraft.

It is an object of this invention to provide a hose clamp of the character described which is mproved as to strength, durability, reliability of performance and the provision for being tightly clamped and released without distorting or damaging any part thereof or the hose.

It i another object of this invention to provide a clamp such as described wherein a loop on a hose embracing band and a trunnion in the loop for slidably accommodating a bolt, embody interengaged means to restrain axial movement of the trunnion and permit relativ turning movement between the, loop and the trunnion in a manner assuring the application, tightening and release of the clamp without damaging the parts thereof or the hose. 7

It is another object of this invention to provide a hose clamp such. as described wherein the loop supporting thetrunnion permits of the interpositionof a tubular spacer on the shank of the bolt between the nut and the trunnion with the spacer and trunnion interengaged in g a manner assuring an efficient clamping and releasing action without likelihood of distorting and damaging any part of the clamp or the hose.

This invention possesses many other advantages, and has otherobjects which may be made more easily apparent from a consideration of several embodiments of the invention. For this purpose, there are shown a number of forms in the drawings accompanying and forming part of the present specification. These forms, which illustrate the general principles of the .invention, will now be described in detail; but it is to be understood that this detailed description is not to be taken in a limiting sense, since the scope of the invention i best defined by the appended claims.

In the accompanying drawings:

Fig. 1 is an elevational view of a clamp embodying the present invention, as it would appear when clamping a hose on a conduit;

Fig. 2 is a top plan view of the clamp as shown in Fig. -1;

Fig. 3 is a fragmentary sectional view taken on the line 33 of Fig. 2;

Fig. 4 is a sectional view taken on the line 44 of F g. 3; a I

Fig. 5 is a perspective view of a modified form of trunnion member forming a part of the clamp of this invention; Fig. 6 is a perspective view of a the modified 5 Claims. (Cl. 24-279) Y member and the trunnion member.

trunnion member looking at the side thereof opposite that shown in Fig. 5; i

Fig. 7 is a longitudinal sectional view of another modified form of this invention;

Fig. 8 is a perspective view of the modified form of spacer tube shown in Fig. 8; and

Fig. 9 is a'longitudinal sectional view of another rnodified form of the invention.

Figs. 1 and 2 show a hose clamp A made in accordance with this invention, as clamping a hose B on a conduit or fitting C, to illustrate a typical use of the clamp.

The clamp A includes a flexible metal band I having loop members 2 and 3 formed on the ends thereof and provided with an extension 4. This extension is welded to the inner surface of one end portion of the band and is adapted to slide between the hose and the other end portion of the band to bridge the gap between the loop members 2 and 3, as shown in Fig. 1.

The head 5 of a T-bolt 6 is pivotally mounted in the loop member 2, with the shank l of the bolt extended through an elongated opening or slot 8 in this loop member. A tubular bushing 9 may be mounted on the head 5 to serve as a bearing therefor cooperable with the inner surface of the loop member 2.

Mounted to turn about its axis in the loop member 3 is a solid and generally cylindrical trunnion member Ill having a opening H extended transversely therethrough to accommodate the shank of the T-bolt, there being aligned elongated openings or slots [2 and I3 in the loop member, through which the shank 1 extends.

In making the c1amp,the ends of the band are bent around the head 5 and trunnion member ID respectively, then spot welded to the band proper, thereby forming the loop members 2 and 3 with the head 5 and trunnion member Ill mounted therein.

The present invention relates more particularly to the construction and relative arrangement of the loop member 3, the trunnion member It, a nut l4 operable on the bolt, and tubular spacer l5 between the nut and the trunnion member.

Thus, the trunnion member Ill and loop member 3 are formed to provide cooperable means for restraining axial movement of the trunnion member in the loop member and permitting relative turning movement between the loop This relative turning movement and the pivotal or swinging movement permitted the T-bolt 6 are essential to provide for a ready alignment of the parts of the clamp in the application thereof posed open;

to a hose and on the tightening of the clamp, as without this movement parts of the clamp might become distorted or damaged in forcing them into the relative positions necessary to apply and tighten the clamp.

As here shown the trunnion member Hi and loop member 3 have interengaged portions to restrain axial movement of the trunnion member and, permit relative turningmovement between the loop member and the trunnion member. Accordingly, in one form of this invention, the loop member 3 is formed in the web portions 3' thereof between the slots i2 and I3, with an indentation or groove IS in which is slidabl'y en: gaged one of a pair of projectio'iis or ribs 11 formed on opposite sides or the trunnipn rnemher [0. The other rib H of the pair of ribs extends as shown in Fig. 3 into the slot 12.. However, it is obvious thatrthe ribs could be formed onthe loop and the roove 17 s o s t t nion. The ribs 11 will more... l ih groove .16 and slotn when thtrunnion member I0 is turned about its a,xis but in cooperation with .the groove and said ,Slot will prevent dislodgement oftrunnionmember iromthe loop mem ber inallposition Qffihfltrunnion member.

The inner iendQf he tubular spacer i extends rreelyrthrou h he.sl infieho e b 3 and abuts the .trunni mem er ilhus, a thetnut. i4 is tightened-against the outer end of the spacer 15, the clamping force is evenly applied to the l op tum mbe sl an 3 rm n of the bolthead 5 and the trunnion member to resneict vely, wi hou he like h d Q distorting .andidamasin th oo sortheb nd 9 damaging thenreie t veooatins r pl t u u ly pp i to t e andandl ps. e. a v

Figs. 5 and 6, a. trunnion [0a may be used inplace oi thetrunnion m, the trunnion 10d havinga flatibearing surface I Iil'b for the ,tubul ar spacer. This fiatsuriace may be ormed; by s atch o e e s em un memb ri ma ner ori i e r-9 Spaced shoulders lqebetween which the inner end of {the -spacer w-ill, -be dis osed when the band is clamped on a hose. fihould the interengaging e ween b r wnn qn em r a l "m mb r b comafi ma dtpr o he w s a in a s mes e. hes 141 r 1 8 w la the Spacer and vprevent axial displacement of the trunnion em er-M, v i v n;.,"avmg the t runnion mfe'mber l0 and loop member-1,3 interengag'ed as here provided, not

an; is the trunnion member restrained against ea mo emen nd permitted filming mo ment but a more intimate contact of the parts -o dad, assuring that the rorees transmitting from the I L trunnionmemberjto the loop members and band will not tend to distort or damage thevloopmembers and the band or damage the e is th e Moreover, 'roviding the spacer L5 as a separate-part which is ,fre'elylinserted through the slot fl 3 so astoicontact the trunnion member with6ut'be ngreouired 0 contact the loop mem- Zber13, no forces are appliedto the loop members 'f'lhich would tend to distort or damage the clamp. u V

Itffsiiouldbe ntitedithatjn having "the two opgs o lotsfifand i3 separatediby the web portion "3' "of thejloop member-:3, "the 'l op member is b i strori'ger construction and 4 fi ectiv'e"bearingjsuriace for "the "trunnion jme'mb'er than would ,be the base if "a, single lon'g slot were formed therein in a :bracing a hose, means forming on the band a loop member having a pair of opposed openings therein for reception of a bolt, a trunnion member mounted to turn in said loop, having a boltreceiving opening extended therethrough and registering with said pair of openings; means for restraining axial movement of -said trunnion member and permitting relative turning movement between the trunnion member and the loop member, including apair of projections on said trunnion member, one of said projections extending into one'fof said openings in said lo'o'p, said loop having a g oove therein into which the other of said projections is extended, and means on said band for-mounting the head of a bolt with the Shank of the bolt extensible through said openings in said loop member and trunnion respectively. 7 r y 2, In a hose clamp, a flexible band for embracing a hose, means forming on the band a loo member havingjopposed openings therein for reception of a bolt, 2, trunnion member mounted to turn in said loop. said trunnion member having a bolt-receiving opening extended therethrough in registry with said opposed openings, means for restraining axial movement of said trunnion member and permitting relative turning movement between the trunnion member and the loop member, said mean-s including a pro.. jectio'n onone of said members and a groove in the other for said 'membe'rs receiving said projectio'n said projection engaging said groove at a point between said opposed openings, and means on said band for mounting a bolt thereon for extension through the openings in said loop member and said trunnion member respectively. 3. In a hose clamp, a flexible band for embracing a hose, means 'forfning'on the band a loop member having 'a pair of opposed 'operiings therein for reception of a bolt, '2. trunnion member mounted to turn in said loop, said'trunnion member having a bolt-receiving opening extended 'therethro'ugh, adapted to register with said pair oiopenings, portions on said members slidably interengaged between 's'aidpairofopenings restraining axial movement of said trunnion member and permitting relative turning movement ,between 'saidfmembers, and means on said band for pivotally mounting a bolt for extension 'throughsaid openings. A I

V 4. In a hose clampga flexible band "for embr'acing 'a'hose to be clamped, means 'at one end of the band forming a loop member having a pair of openings therein, a trunnion member mounted in said loop member *for turning moveinent therein, said trunnion member having a bolt-receiving opening therein adapted to register with f said pair of openings, a pair of projections 'on said trunnionmemb'e'r; said loop-memberhaving a portion disposed between aid'pairof openings, said ortion having a "groove slidably receiving one oi. said projections, the other of said projections being movable in one of the openings of said pair, a bolt, and means pivotally mounting said bolt adjacent the other end of said band for extension through said openings.

5. In a hose clamp, a flexible band for embracing a hose to be clamped, means at one end of the band forming a loop having a pair of openings therein, a trunnion mounted in said loop for turning movement therein, said trunnion having a bolt-receiving opening extended therethrough and registering with said pair of openings, a pair of projections on said trunnion, said loop having a portion between said pair of openings engageable by one of said projections to restrain axial movement of said trunnion in said loop, the other of said projections extending into one of the openings of said pair, a bolt, means pivotally mounting the bolt adjacent the other DON B. KATES.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 991,769 Catelain May 9, 1911 FOREIGN PATENTS Number Country Date 208,659 Great Britain Dec. 27, 1923 229,073 Great Britain Feb. 19, 1925 

